Google is still operating its Project Fi MVNO service on a small scale, opting to take baby steps forward rather than giant leaps. One such small step is expanding the service beyond smartphones with a new data-only SIM.

Existing Project Fi users will soon be able to sign up for a data-only SIM for devices like a tablet. Unlike traditional carriers that charge a per-device fee, Google will let you add extra data-only devices to your Project Fi account free of charge. Up to nine devices can be added per account, all of which sip from the same data bucket as your smartphone.

As of writing, Google has verified that the following devices will work with Project Fi:

Nexus 7 - K009 (US LTE)

Nexus 9 - 0P82300 (US LTE)

iPad Air 2 - Model A1567

iPad mini 4 - Model A1550

Galaxy Tab S - Model SM-T807V

It's worth noting that these are only the confirmed devices and others are likely to work as well. Do note that you'll need an unlocked device that works with the T-Mobile (GSM radio) as the data-only service doesn't work on Sprint's network. Google also points out that tethering from a device with a data-only SIM isn't supported.

The option to order a data-only SIM should appear for existing Project Fi subscribers in the coming days. Those who want to apply for Project Fi (it's invite-only at the moment) can do so by clicking here.